8918143 has 4 divisors (see below), whose sum is σ = 9604168. Its totient is φ = 8232120.

The previous prime is 8918141. The next prime is 8918171. The reversal of 8918143 is 3418198.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8918143 - 2¹ = 8918141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8918099 and 8918108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8918141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342993 + ... + 343018.

It is an arithmetic number, because the mean of its divisors is an integer number (2401042).

Almost surely, 2^8918143 is an apocalyptic number.

8918143 is a deficient number, since it is larger than the sum of its proper divisors (686025).

8918143 is a wasteful number, since it uses less digits than its factorization.

8918143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686024.

The product of its digits is 6912, while the sum is 34.

The square root of 8918143 is about 2986.3260036372. The cubic root of 8918143 is about 207.3758331995.

Subtracting from 8918143 its reverse (3418198), we obtain a palindrome (5499945).

The spelling of 8918143 in words is "eight million, nine hundred eighteen thousand, one hundred forty-three".